Double saw set



l A. B. ANDERSON DOUBLE SAW SET Filed Dec. 2o, 1923 oted to said handle lever by a pin or rivet 3l. The pin 3l lines in a horizontal plane substantially midway between the planes of the pivotal connections of the links or toggles 29, to the arms 27, 28 and is spaced rearwardly therefrom, so that when the handle lever 18, in its lower portion, is moved manually toward the rigid handle 17. by pressure in the hand of an operator against the action of the spring 20, the rear ends of thearms 27, 23 are moved apart in vertical planes, thus causing a rotary oscillation or rocking movement of the rollers 2l, 22 in opposite directions, on their axes, said rollers rocking away from each other. rlihe top l0 is formed with an aperture 32 near its rear end through which the link or toggle 30 extends freely. The arm 28 is bifurcated in its forward portion, through which bifurcation the operator can view the space midway between the rollers 21, 22, a central aperture 33 being formed in the top l() in registry with said bifurcation and above such space. rlhe side walls l1, l2 are formed with tapering notches 34 opening to their lower margins, midway of the space between the rollers 2l, 22, and the bottom plate or floor l5 is cut away between the lower edges of said notches, whereby said bottom plate or floor is divided into two separate spaced members, thus providing a space trans` versely of the frame or housing and extending upwardly from its bottom a material distance, within which a saw blade 35 (dotted lines Figure 3) may project in vertical position, in a common manner, for treatment by the tool.

A block 36 is mounted within the forward end portion of the frame or housing, extending from top to bottom and from side to side thereof, and said block is slidable longitudinally of said frame or housing in seats 37 formed in the top and bottom thereof. A lug 38 is formed on and centrally of and projects forwardly from the block 36 and is received within a cam notch 39 formed in the rearward face of the roller 22, said cam notch being of greater length than the width of said lug. A carrying block 40 is provided at the rear face of the Y block 36 and is slidably adjustable laterally therein by means of tongue and groove connections 4l (Figure 5). The lateral adjustment of the carrying yblock 40 in the block 36 is effected and controlled by means of a s rew 42 extending loosely through the side `wall l1., swiveled in an ear 43 carried by the block 36, and having screw connections with said block 40. An anvil 44 is carried by and vertically adjustable on the carrying block 40, being formed with a tongue sliding in a groove 45 in said block 40. The vertical adjustment of the anvil 44 in the i rarrying block 40 is effected and controlled 5 by means of a screw 46 swiveleol in an ear 47 formed on said block and having screw connections with the lower portion of said anvil, and when so adjusted the anvil is set and locked in place by means of a clamping screw 48 extending loosely through the side wall ll, threaded in the side of the block 40 and adapted to engage at its inner end the tongue of said anvil. A plunger 49 also is carried by the block 36, at one side of the carrying block 40 and anvil 44, and said plunger is formed with. a stem 50 (dotted lines Figures 3 and projecting within an aperture in the rear face of said block; and the forward end of said plunger is extended within a rectangular seat 5l in the fate of said block, 'to prevent torsional movement of the plunger.

A second operating' block 52 is mounted within the frame or housing, in opposition to the block 36 and on the opposite side of the notches 34 therefrom, and also extends from top to bottom of the housing and from side to side thereof, and said block is slidable longitudinally of said frame or housing in seats 53 formed in the top and bottom thereof. A lug 54 is formed on and centrally of and projects rearwardly from the block 52 and is received within a cam notch formed in the forward face of the roller 2l. An anvil 56 is carried by the forward face of the block 52, at one side of the center thereof, said anvil being vertically adjustable -by means of `a tongue thereon slidable in a groove 57 in said block. Vertical adjustment of the anvil 56 relative to the block 52 is effected and controlled by means of a screw 58 swiveled in an ear 59 formed on said block and having screw connections with the bottom of said anvil; and said anvil is set and locked in its adjusted position by means of a clamping screw 60 extending loosely through the side wall l2, threaded through one side of the block 52 and adapted to engage at its inner end the tongue of the anvil. rlhe screws 42, 48 and 60 extend loosely through slots such as 6l (Figur-e l) formed in and longitudinally of the side walls of the housing. A plunger 62 also is carried by the forward face of the block 52, at one side of the anvil 56 and said plunger is slidably mounted in a transverse groove or opening 63 in said block and thus adjustable 'laterally of the device. Lateral adjustment of the plunger 62 .in the block 52 is effected and controlled by a screw 64 extending loosely through a slot such as 6l in the side wall ll, swiveled in that portion of the block 52 between one of its ends and the adjacent end` of the slot or groove 63, and having screw connections with the said plunger.

ln practical use the tool is employed in a manner common and well known in setting the teeth of saws, with this dierence, that two adjacent teeth of the saw are simultaneously set or bent laterally, in opposite directions, by each operation of the device Ithrough manipulation of the `lever18 manually, the position of the sawV 34 and'two such ladjacent teeth being indicated by dotted llines in Figure 3. Theoperation is effected by4 pressure of the hand of they operator tocontract the lever 18 towardl the handle 17, againstl the spring 20, whichspring acts to return thelever," and-other 'members' connected therewith; Vaftervpre's'sure is relaxed. This oscillation of the lever under "-manual pressure serves to move and spread the cam grooves or notches 55 and 39`thereof, presses the operating'blocks 36`and 52 toward each other by pressure lagainst the ends of the lugs SSa-nd 54, said blocks sliding in the seats in theframe. 'Such reciproi cation of the blocks 36, 52 carries Vforward the plunger's 49 and 62 and the anvils 44 and 56; the plunger 49 being located'opposite toand cooperating with the anvil 56`yv and the plunger 62 being locatedopposite to and cooperating with the anvil 44.v The plungers 49, 62, vas is common, are formed with relatively narrow,vertically extending setting edges, which slope' fron'r top to bottom, and adapted tocooperate with oppositely sloping faces of the anvils. Theplungers and anvilsv are both moved toward the plane of operationjwhen the movement above described takes place, and the plungers engage, from opposite sides, adjacent teeth of a saw held in proper position, and said teeth, backed by the respective anvils, are properly set by the continued pressure n exerted through the lever 18, in opposite directions. Thus two teeth are set by one operation and the length of time required to properly set a saw is approximately cut in half. When pressure on the lever 18 is relaxed, the operating blocks 86 and 52 are retracted to normal positions by means of coil springs 65, 66 respectively, connecting said blocks to the arms 28 and 27. The spring 66 is directly connected to an intermediate portion of the curved arm 27 but the spring is connected to a bracket 67 formed on and extending downwardly from one member of the bifurcated portion of the arm 28, and then turned laterally toward the median line of the device.

To adjust the device to operate on saws of varying thickness, the anvils 44, 56 are adjusted vertically in their seats, thus bringing their inclined faces closer to or farther away from the operating edges of the respective plungers. This adjustment is accomplished, as to the anvil 44, by turninoP the screw 46 to cause the anvil to trave vertically relative to the carrying block 40, and as to the anvil 56 by turning the screw y58 to cause the anvil "to" travel verticallyrelative to the oliveratin'g' block 52, theiclainping screws 48 and V60 then being set to' hold the anvils in their adjusted positions. i

To adjust the tool for operation 'nsaws of varyingspacin'g'of teethlcoars'eness or fineness), the plunger 62 Iis adjustedlaterally by operation of the screw 64," thus moving it toward or away from thephi'nger` 49 in a'lateral direction. Also the anvil 44 is adjusted laterally to correspond, by operation of the screw 42, to adjust the `c'ai"rying block 40 laterally yin the? operating block 36,

and'withit the anvil 44.

This double tool greatly reduces thevtime required to set a given saw and savesturning the saw end for end, as is now commonly done, and putting it through the tool twice,

yinopposite directions, to set alternate teeth in the same direction.

The roller 22 is made of considerably greater diameter than the roller 21", and consequently its camk groove 38 is 'correspond `ingly larger and has Vgreater throw, to ',com;

pensate for the'increased distance v"of'tsaid roller 22 from the 'lever 18, wherebyA the travel of both the blocks 36 and 52 with the operating memberscarried thereby, is

substantially equalize'd, despite the increased length of the arm 28"relative to the' arm 27.

I claim as my invention- Y 1. A double saw set, comprising frame, arigid'handle on one"l end thereof, alever pivotedbet'ween itsends on said frame and adapted to cooperate with said handle, a spring acting to press said lever away from said handle, rollers journaled in said frame and formed with cam notches on their opposed faces, arms on said rollers extending toward one end of said lever, toggles flexibly connecting free ends of said arms to the free end of said lever, and saw-treatin@ devices slidably mounted in said frame and movable by action of said cam rollers, said saw-treating devices operating in pairs in opposite directions.

2. A double saw set, comprising a frame, a rigid handle on one end thereof, a lever pivoted between its ends on said frame and adapted to cooperate with said handle, a spring acting to press said lever away from said handle, cam rollers journaled in spaced relation in said frame, arms on said rollers extending toward said lever, toggles flexibly connecting free ends of said arms to the upper end of said lever, anvils arranged in staggered relation in said frame, and plungers arranged opposite said anvils and adapted to cooperate therewith to set adjacent teeth of a saw in opposite directions when said lever is oscillated.

3. A double saw set, comprising a frame, a rigid handle on one end thereof, a lever pivoted between its ends on said frame and adapted to cooperate with said handle, a

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spring acting to press said lever away from said handle, cam rollers journaled in spaced relation in said frame, arms on said rollers extending toward said lever, toggles flexibly connecting said arms to the upper end lof said lever, anvils arranged in staggered relation in said frame, plungers operable by said cam rollers and arranged opposite said anvils and adapted to cooperate therewith to simultaneously set adjacent teeth ot a saw, and springs acting to retract said plungers.

4. A double saw set, comprising a trame, a rigid handle thereon, a lever pivoted on said trame and adapted to cooperate with said handle, a spring acting to press said lever away from said handle, cam rollers journaled in spaced relation in said traine, arms on said rollers extending toward said lever, toggles liexibly connecting said arms to said lever to oppositely rotate said rollers when said lever is oscillated, anvils arranged in staggered relation in said traine, plungers operable by said cam rollers and arranged opposite said anvils and adapted to eooperate therewith to simultaneously set adjacent teeth ot' a saw, and means tor adjusting one of said plungers laterally.

A double saw set, comprisingl a traine, a. rigid handle thereon, a lever pivoted on said frame and adapted to cooperate with said handle, a spring acting to press said lever away from said handle, cam rollers journaled in spaced relation in said trame,

connections between said lever and rollers for rotating the latter oppositely when said lever is oscillated, anvils arranged in stag gered relation in said frame, plungers operable by said cam rollers, arranged opposite said anvils and adapted to cooperate therewith to simultaneously set adjacent teeth ot' a saw, means for adjusting said anvils ver tically, and means for adjusting one ot said anvils and the corresponding plunger laterally.

6. A double saw set, comprising a trame, a rigid handle thereon, a lever pivoted on said frame and adapted to cooperate with said handle, a spring acting to press said lever away from said handle, cam rollers journaled in spaced relation in said trame, connections between said lever and rollers for oscillating the latter oppositely when said lever is oscillated, blocks slidably mounted in said frame between said rollers and operable by the cams thereof toward each other, an anvil carried by each block, screw devices for vertically adjusting said anvils in said blocks, said anvils being arranged in staggered relation, plunge-rs carried by said bloc-ks opposite and adapted to cooperate with said anvils to simultaneously set adjacent teeth of a saw, and screw devices for adjusting one of said anvils and the corresponding plunger laterally in their respective blocks.

ANDREW BERT ANDERSON. 

